Water-absorbing composition and production method therefor
AssigneeKao Corporation
InventorsYuki Takada, Takuya Kouta
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Abstract
An absorbent composition containing cellulose nanofibers and a cellulose derivative and a method for making the same are disclosed. The cellulose derivative has a viscosity of 1000 mPa·s or higher in a 1 mass % aqueous solution at 25° C. and a degree of etherification of less than 0.9. The cellulose derivative is preferably at least one member selected from the group consisting of carboxymethyl cellulose, carboxyethyl cellulose, a carboxymethyl cellulose salt, and a carboxyethyl cellulose salt, more preferably a carboxymethyl cellulose salt, even more preferably sodium carboxymethyl cellulose.
Claims16
An absorbent composition, comprising:
- cellulose nanofibers;
- and
- a cellulose derivative comprising a carboxy cellulose or a carboxy cellulose salt;
- wherein:
- the cellulose derivative has a viscosity of 6500 to 8000 mPa·s in a 1 mass % aqueous solution at 25° C.;
- and
- the cellulose derivative has a degree of etherification of 0.7 or less;
- and
- the absorbent composition has a ratio C1:C2 of 1:1 to 1:10, wherein:
- C1 is a content by mass of the cellulose nanofibers in the absorbent composition;
- and
- C2 is a content by mass of the cellulose derivative in the absorbent composition.
Dependencies are inferred from the claim text.